| Not yet in force: | [see article XIV (1)]. |
| Status: | Signatories: 155 ,Parties: 51. |
| Text: | Doc. A-50-1027. |
Note: At its 50th session, the General Assembly adopted, on 10 September 1996 by resolutionA-RES-50-245 the Comprehensive Nuclear-Test-Ban Treaty as contained in document A-50-1027. In the same resolution, the General Assembly requested the Secretary-General, as depositary of the Treaty, to open it for signature at United Nations Headquarters in New York at the earliest possible date. The Treaty was opened for signature on 24 September 1996 and it will remain open for signature until its entry into force, in accordance with article XI.
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| Participant | Signature | Ratification |
| Albania | 27 Sep 1996 | |
| Algeria | 15 Oct 1996 | |
| Andorra | 24 Sep 1996 | |
| Angola | 27 Sep 1996 | |
| Antigua and Barbuda | 16 Apr 1997 | |
| Argentina | 24 Sep 1996 | 4 Dec 1998 |
| Armenia | 1 Oct 1996 | |
| Australia | 24 Sep 1996 | 9 Jul 1998 |
| Austria | 24 Sep 1996 | 13 Mar 1998 |
| Azerbaijan | 28 Jul 1997 | 2 Feb 1999 |
| Bahrain | 24 Sep 1996 | |
| Bangladesh | 24 Oct 1996 | |
| Belarus | 24 Sep 1996 | |
| Belgium | 24 Sep 1996 | 29 Jun 1999 |
| Benin | 27 Sep 1996 | |
| Bolivia | 24 Sep 1996 | 4 Oct 1999 |
| Bosnia and Herzegovina | 24 Sep 1996 | |
| Brazil | 24 Sep 1996 | 24 Jul 1998 |
| Brunei Darussalam | 22 Jan 1997 | |
| Bulgaria | 24 Sep 1996 | 29 Sep 1999 |
| Burkina Faso | 27 Sep 1996 | |
| Burundi | 24 Sep 1996 | |
| Cambodia | 26 Sep 1996 | |
| Canada | 24 Sep 1996 | 18 Dec 1998 |
| Cape Verde | 1 Oct 1996 | |
| Chad | 8 Oct 1996 | |
| Chile | 24 Sep 1996 | |
| China | 24 Sep 1996 | |
| Colombia | 24 Sep 1996 | |
| Comoros | 12 Dec 1996 | |
| Congo | 11 Feb 1997 | |
| Cook Islands | 5 Dec 1997 | |
| Costa Rica | 24 Sep 1996 | |
| Côte d'Ivoire | 25 Sep 1996 | |
| Croatia | 24 Sep 1996 | |
| Cyprus | 24 Sep 1996 | |
| Czech Republic | 12 Nov 1996 | 11 Sep 1997 |
| Democratic Republic of the Congo | 4 Oct 1996 | |
| Denmark | 24 Sep 1996 | 21 Dec 1998 |
| Djibouti | 21 Oct 1996 | |
| Dominican Republic | 3 Oct 1996 | |
| Ecuador | 24 Sep 1996 | |
| Egypt | 14 Oct 1996 | |
| El Salvador | 24 Sep 1996 | 11 Sep 1998 |
| Equatorial Guinea | 9 Oct 1996 | |
| Estonia | 20 Nov 1996 | 13 Aug 1999 |
| Ethiopia | 25 Sep 1996 | |
| Fiji | 24 Sep 1996 | 10 Oct 1996 |
| Finland | 24 Sep 1996 | 15 Jan 1999 |
| France | 24 Sep 1996 | 6 Apr 1998 |
| Gabon | 7 Oct 1996 | |
| Georgia | 24 Sep 1996 | |
| Germany | 24 Sep 1996 | 20 Aug 1998 |
| Ghana | 3 Oct 1996 | |
| Greece | 24 Sep 1996 | 21 Apr 1999 |
| Grenada | 10 Oct 1996 | 19 Aug 1998 |
| Guatemala | 20 Sep 1999 | |
| Guinea | 3 Oct 1996 | |
| Guinea-Bissau | 11 Apr 1997 | |
| Haiti | 24 Sep 1996 | |
| Holy See | 24 Sep 1996 | |
| Honduras | 25 Sep 1996 | |
| Hungary | 25 Sep 1996 | 13 Jul 1999 |
| Iceland | 24 Sep 1996 | |
| Indonesia | 24 Sep 1996 | |
| Iran (Islamic Republic of) | 24 Sep 1996 | |
| Ireland | 24 Sep 1996 | 15 Jul 1999 |
| Israel | 25 Sep 1996 | |
| Italy | 24 Sep 1996 | 1 Feb 1999 |
| Jamaica | 11 Nov 1996 | |
| Japan | 24 Sep 1996 | 8 Jul 1997 |
| Jordan | 26 Sep 1996 | 25 Aug 1998 |
| Kazakhstan | 30 Sep 1996 | |
| Kenya | 14 Nov 1996 | |
| Kuwait | 24 Sep 1996 | |
| Kyrgyzstan | 8 Oct 1996 | |
| Lao People's Democratic Republic | 30 Jul 1997 | |
| Latvia | 24 Sep 1996 | |
| Lesotho | 30 Sep 1996 | 14 Sep 1999 |
| Liberia | 1 Oct 1996 | |
| Liechtenstein | 27 Sep 1996 | |
| Lithuania | 7 Oct 1996 | |
| Luxembourg | 24 Sep 1996 | 26 May 1999 |
| Madagascar | 9 Oct 1996 | |
| Malawi | 9 Oct 1996 | |
| Malaysia | 23 Jul 1998 | |
| Maldives | 1 Oct 1997 | |
| Mali | 18 Feb 1997 | 4 Aug 1999 |
| Malta | 24 Sep 1996 | |
| Marshall Islands | 24 Sep 1996 | |
| Mauritania | 24 Sep 1996 | |
| Mexico | 24 Sep 1996 | 5 Oct 1999 |
| Micronesia (Federated States of) | 24 Sep 1996 | 25 Jul 1997 |
| Monaco | 1 Oct 1996 | 18 Dec 1998 |
| Mongolia | 1 Oct 1996 | 8 Aug 1997 |
| Morocco | 24 Sep 1996 | |
| Mozambique | 26 Sep 1996 | |
| Myanmar | 25 Nov 1996 | |
| Namibia | 24 Sep 1996 | |
| Nepal | 8 Oct 1996 | |
| Netherlands | 24 Sep 1996 | 23 Mar 1999 |
| New Zealand | 27 Sep 1996 | 19 Mar 1999 |
| Nicaragua | 24 Sep 1996 | |
| Niger | 3 Oct 1996 | |
| Norway | 24 Sep 1996 | 15 Jul 1999 |
| Oman | 23 Sep 1999 | |
| Panama | 24 Sep 1996 | 23 Mar 1999 |
| Papua New Guinea | 25 Sep 1996 | |
| Paraguay | 25 Sep 1996 | |
| Peru | 25 Sep 1996 | 12 Nov 1997 |
| Philippines | 24 Sep 1996 | |
| Poland | 24 Sep 1996 | 25 May 1999 |
| Portugal | 24 Sep 1996 | |
| Qatar | 24 Sep 1996 | 3 Mar 1997 |
| Republic of Korea | 24 Sep 1996 | 24 Sep 1999 |
| Republic of Moldova | 24 Sep 1997 | |
| Romania | 24 Sep 1996 | 5 Oct 1999 |
| Russian Federation | 24 Sep 1996 | |
| Saint Lucia | 4 Oct 1996 | |
| Samoa | 9 Oct 1996 | |
| San Marino | 7 Oct 1996 | |
| Sao Tome and Principe | 26 Sep 1996 | |
| Senegal | 26 Sep 1996 | 9 Jun 1999 |
| Seychelles | 24 Sep 1996 | |
| Singapore | 14 Jan 1999 | |
| Slovakia | 30 Sep 1996 | 3 Mar 1998 |
| Slovenia | 24 Sep 1996 | 31 Aug 1999 |
| Solomon Islands | 3 Oct 1996 | |
| South Africa | 24 Sep 1996 | 30 Mar 1999 |
| Spain | 24 Sep 1996 | 31 Jul 1998 |
| Sri Lanka | 24 Oct 1996 | |
| Suriname | 14 Jan 1997 | |
| Swaziland | 24 Sep 1996 | |
| Sweden | 24 Sep 1996 | 2 Dec 1998 |
| Switzerland | 24 Sep 1996 | 1 Oct 1999 |
| Tajikistan | 7 Oct 1996 | 10 Jun 1998 |
| Thailand | 12 Nov 1996 | |
| the former Yugoslav Republic of Macedonia | 29 Oct 1998 | |
| Togo | 2 Oct 1996 | |
| Tunisia | 16 Oct 1996 | |
| Turkey | 24 Sep 1996 | |
| Turkmenistan | 24 Sep 1996 | 20 Feb 1998 |
| Uganda | 7 Nov 1996 | |
| Ukraine | 27 Sep 1996 | |
| United Arab Emirates | 25 Sep 1996 | |
| United Kingdom of Great Britain and Northern Ireland | 24 Sep 1996 | 6 Apr 1998 |
| United States of America | 24 Sep 1996 | |
| Uruguay | 24 Sep 1996 | |
| Uzbekistan | 3 Oct 1996 | 29 May 1997 |
| Vanuatu | 24 Sep 1996 | |
| Venezuela | 3 Oct 1996 | |
| Viet Nam | 24 Sep 1996 | |
| Yemen | 30 Sep 1996 | |
| Zambia | 3 Dec 1996 | |
| Zimbabwe | 13 Oct 1999 |
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Declarations made upon signature:
1. China has all along stood for the complete prohibition and thorough destruction of nuclear weapons and the realization of a nuclear-weapon-free world. It is in favor of a comprehensive ban on nuclear weapon test explosions in the process towards this objective. China is deeply convinced that the CTBT will facilitate nuclear disarmament and nuclear non-proliferation. Therefore, China supports the conclusion, through negotiation, of a fair, reasonable and verifiable treaty with universal adherence and unlimited duration and is ready to take active measures to promote its ratification and entry into force.
2. Meanwhile, the Chinese Government solemnly makes the following appeals:
(1) Major nuclear weapon states should abandon their policy of nuclear deterrence. States with huge nuclear arsenals should continue to drastically reduce their nuclear stockpiles.
(2) All countries that have deployed nuclear weapons on foreign soil should withdraw all of them to their own land. All nuclear weapon states should undertake not to be the first to use nuclear weapons at any time and under any circumstances, commit themselves unconditionally to the non-use or threat of use of nuclear weapons against non-nuclear weapon states or nuclear weapon-free zones, and conclude, at an early date, international legal instruments to this effect.
(3) All nuclear weapon states should pledge their support to proposals for the establishment of nuclear weapon-free zones, respect their status as such and undertake corresponding obligations.
(4) No country should develop or deploy space weapon systems or missile defence systems undermining strategic security and stability.
(5) An international convention on the complete prohibition and thorough destruction of nuclear weapons should be concluded through negotiations.
3. The Chinese Government endorses the application of verification measures consistent with the provisions of the CTBT to ensure its faithful implementation and at the same time it firmly opposes the abuse of verification rights by any country, including the use of espionage or human intelligence, to infringe upon the sovereignty of China and impair its legitimate security interests in violation of universally recognized principles of international law.
4 . In the present day world where huge nuclear arsenals and nuclear deterrence policy based on the first use of nuclear weapons still exist, the supreme national interests of China demand that it ensure the safety, reliability and effectiveness of its nuclear weapons before the goal of eliminating all nuclear weapons is achieved.
5. The Chinese Government and people are ready to continue to work together with governments and peoples of other countries for an early realization of the lofty goal of the complete prohibition and thorough destruction of nuclear weapons.
Declaration made upon signature:
It is the understanding of the German Government that nothing in this Treaty shall ever be interpreted or applied in such a way as to prejudice or prevent research into and development of controlled thermonuclear fusion and its economic use.
Declarations upon signature:
"The Holy See is convinced that in the sphere of nuclear weapons, the banning of tests and of the further development of these weapons, disarmament and non-proliferation are closely linked and must be achieved as quickly as possible under effective international controls.
Furthermore, the Holy See understands that these are steps towards a general and total disarmament which the international community as a whole should accomplish without delay."
Declarations upon signature:
"1. The Islamic Republic of Iran considers that the Treaty does not meet nuclear disarmament criteria as originally intended. We had not perceived a CTBT only as non-proliferation instrument. The Treaty must have terminated fully and comprehensive further development of nuclear weapons. However, the Treaty bans explosions, thus limiting such development only in certain aspects, while leaving others avenues wide open. We see no other way for the CTBT to be meaningful, however, unless it is considered as a step towards a phased program for nuclear disarmament with specific time frames through negotiations on a consecutive series of subsequent treaties.
2. On National Technical Means, based on the deliberation that took place on the issues in the relevant Ad Hoc Committee of the Conference on Disarmament in Geneva, we interpret the text as according a complementary role to them and reiterate that they should be phased out with further development of the International Monitoring System. National Technical Means should not be interpreted to include information received from espionage and human intelligence.
3. The inclusion of Israel in the MESA grouping constitutes a politically-motivated aberration from UN practice and is thus objectionable. We express our strong reservation on the matter and believe that it will impede the implementation of the Treaty, as the confrontation of the States in this regional group would make it tremendously difficult for the Executive Council to form. The Conference of the States Parties would eventually be compelled to find a way to redress this problem."
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1. On 29 January 1997, the Secretary-General received from the Government of Israel the following communication with regard to the declaration contained in paragraph 3:
"Israel considers that Iran's declaration on this matter has no legal basis and is entirely motivated by political reasons extraneous to the CTBT.
The Iranian declaration attempts to undermine the implementation of the treaty and is incompatible with both the Treaty and its spirit, as well as with the U.N. Charter principle of sovereign equality of all states.
Israel, by geography, is part of the Middle-East region, and no objection will change this.
Israel calls upon other signatories of the CTBT to express their rejection of the Iranian reservation to Israel's inclusion in the MESA Geographic region, as well as the threat contained therein."
2. On behalf of the Kindom in Europe, the Nethelrands Antilles and Aruba.